GP/SS diamond stacking ring

 *****   ******    *****         *   *****    *****    *****   
*     *  *     *  *     *        *  *     *  *     *  *     *  
*        *     *  *              *  *        *     *  *        
*        ******   *              *   *****   *     *  *        
*        *     *  *              *        *  *     *  *   ***  
*     *  *     *  *     *  *     *  *     *  *     *  *     *  
 *****   ******    *****    *****    *****    *****    *****